/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.edu.thu.laud.utils.serde;

import java.nio.ByteBuffer;

import org.datanucleus.store.types.ObjectLongConverter;

/**
 * Encapsulates both a long converter and a DN long converter in the same
 * instance
 * 
 * @author zhuoan
 * 
 */
public class ObjectLongWrapperConverter implements IConverter {

	private ObjectLongConverter dnLongConverter;
	private IConverter longConverter;

	public ObjectLongWrapperConverter(ObjectLongConverter dnLongConverter,
			IConverter longConverter) {
		this.dnLongConverter = dnLongConverter;
		this.longConverter = longConverter;
	}

	@Override
	public String getComparatorType() {
		return "IntegerType";
	}

	@Override
	public Object getObject(ByteBuffer buffer, ConverterContext context) {
		if (buffer == null) {
			return null;
		}
		return dnLongConverter.toObject((Long) longConverter.getObject(buffer, context));
	}

	@Override
	public ByteBuffer writeBytes(Object value, ByteBuffer buffer, ConverterContext context) {
		Long longVal = dnLongConverter.toLong(value);

		return longConverter.writeBytes(longVal, buffer, context);

	}

	

}
